I've got two heads. One goes to a cracked holding tank. We won't talk about that. The other goes to a nice new top-fitting head with hoses not older than 5 years. It's a Jabsco manual "compact" head - which is to say the bowl is the size of a toilet you'd use to potty-train a toddler. Also, it appears to leak black water from basically every gasket, and the joker valve closes completely about 80% of the time, refilling the bowl the rest of the time. I saw in a youtube video that Jabsco marine toilets come nearly completely assembled. You just have to bolt them down, connect the hoses and you're good to go (in theory). And it looks like Defender.com has the non-compact manuals on sale for $225 or thereabouts. And so I'm thinking that installing a new Jabsco (where the floor bolts all line up with the previous assembly) would actually be substantially less work than fixing the one I have now, where I'd have to replace all the gaskets and probably re-connect the hoses just to rule them out as culprits anyway. The gasket kits are $40 from what I've seen (and I don't know how old my current unit is, so I have to worry about non-matching parts). I'd be paying $185 to save myself maybe a couple of hours of mucking about. So, esteemed reader, is that crazy to replace a whole toilet just to cut down on the time spent with a wrench wrestling with nasty hoses in a confined space?